FASTENERS FOR
USE WITH PC BOARDS
BULLETIN
K
1015
R e v 316
FASTENERS FOR USE WITH PC BOARDS
No matter how sophisticated or advanced, electronic components must be attached reliably and securely if they are
to deliver optimum performance. We offer several fastener products for use with PC boards to satisfy component-toboard, board-to-board, and board-to-chassis attachment needs.
ReelFast® surface mount fasteners mount on PC boards in the same manner and at the same time as other surface
mount components prior to the automated reflow solder process. The fasteners simply become another board
component. This alleviates concerns about potential damage to PC boards due to improper secondary installation
operations. The fasteners are provided on tape and reel compatible with existing SMT automated installation
equipment. The benefits of using ReelFast® SMT fasteners are: faster assembly; reduced scrap; reduced handling;
and reduced risk of board damage.
Broaching fasteners can also offer practical alternatives to “loose” hardware. A broaching fastener is a knurled-shank
fastening device that can be pressed into a hole to provide a permanent, strong, threaded or unthreaded attachment
point in PC boards. They can also be used in aluminum, acrylic, casting and polycarbonate components. Specially
formed axial grooves around the shank of the fastener “broach” or cut into the material, creating a firm, interferencetype fit resistant to rotation. In PC boards, broaching fasteners are recommended for use in non-plated holes.
Broach/flare-mount standoffs (Type KFB3) offer a combined broach/flare feature for even greater pullout
performance in PC board materials.
NUTS AND SPACERS/STANDOFFS
STUDS
Type SMTSO/SMTSOB - ReelFast® surface
mount nuts and standoffs are available
threaded and unthreaded - PAGE 4
Type KFH - Threaded broaching studs for use
as solderable connectors or as permanently
mounted studs on PC boards - PAGE 11
Types KF2/KFS2 - Broaching nuts, internally
threaded for mounting on PC boards PAGE 5
RIGHT ANGLE FASTENERS
Type SMTRA - ReelFast® R’ANGLE® surface
mount fasteners provide strong re-usable
threads at right angles to PC boards PAGE 12
Types KFE/KFSE - Broaching standoffs,
threaded or unthreaded for stacking or
spacing - PAGE 6
SHEET JOINING FASTENERS
Type KFB3 - Broach/flare-mount standoffs with
greater pullout performance - PAGE 6
Type SFK - SpotFast® clinch/broach mount
fasteners for joining metal to PCB/plastic panels
- PAGE 13
Type KSSB - Broaching, SNAP-TOP®
standoffs feature a spring action to hold PC
board securely without screws or threaded
hardware - PAGE 7
MATERIAL AND FINISH SPECIFICATIONS PAGE 14
CAPTIVE PANEL SCREWS
Type SMTPFLSM - ReelFast® surface mount
spring-loaded captive panel screws - PAGE 8
Type PSHP - ReelFast® surface mount captive
panel screws - PAGE 9
Type PFK - Broaching panel fastener
assemblies for mounting on PC boards PAGE 10
K-2 PennEngineering • www.pemnet.com
New
INSTALLATION PAGES 15-17
PERFORMANCE DATA PAGES 18-19
OTHER FASTENERS FOR USE WITH PC BOARDS PAGE 20
FASTENERS FOR USE WITH PC BOARDS
PEM® TRADEMARKS
Dimple
(Registered
Trademark)
Two Groove
(Registered
Trademark)
Blue
Retaining Ring
Double Notch
(Trademark)
(Registered
Trademark)
To be sure that you are getting genuine PEM® brand fasteners, look for the unique PEM product markings and identifiers.
QUICK REFERENCE CHART
Primary Use
Mounting Types
PEM
Fastener Page
Type No.
Broach
Broach/ Surface
Flare
Mount
Clinch/
Broach
Nut
Spacer/
Snap
Standoff Attachment Stud
Right
Captive Color
Angle
Sheet
Screw Coding Attachment Joining
SMTSO/SMTSOB
4
KF2/KFS2
5•
KFE/KFSE
6
•
KFB3
6
KSSB
7
•
SMTPFLSM
8
•
•
SMTPF
9
•
•
PFK
10
•
KFH
11
•
SMTRA
12
SFK
13
•
Nut/Spacer/Standoff
Nut
Spacer/Standoff
Standoff
Standoff
Captive Screw Assembly
Captive Screw with Plastic Knob
Captive Screw
Stud
Right Angle
Sheet Joining
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
PennEngineering • www.pemnet.com
K-3
FASTENERS FOR USE WITH PC BOARDS
TYPES SMTSO/SMTSOB ReelFast® SURFACE MOUNT NUTS AND SPACERS/STANDOFFS
Type SMTSO
Type SMTSOB
Two Groove
(Registered Trademark)
Two Groove
(Registered Trademark)
C
C
A
E
L
A
E
L
Thread/thru hole sizes 2-56, 4-40, 6-32, 8-32, 116, 143, M2, M2.5, M3, M3.5, M4, 3.6, and 4.2
microPEM® Type SMTSO
Double Notch (Registered Trademark)
Metric -1 length not marked
E
H
Solder
Pad
Plated through
hole not required.
A
Thread sizes 080, S1, S1.2, S1.4 and M1.6
All dimensions are in inches.
UNIFIED
L
ØD
Stencil Masking Examples
C
Thru
Thread
Hole
Size
+.004 –.003
.060-80
—
(#0-80)
.086-56
—
(#2-56)
.112-40
—
(#4-40)
.138-32
—
(#6-32)
.164-32
—
(#8-32)
—
.116
— .143
ØH
Type
Length Code “L” ±.005
Thread or
(Length code in 32nds of an inch)
Fastener Material Thru Hole
SteelBrassCode .062.125.250.375
SMTSO —
080
Min.
E
Sheet
A
C
H
Thickness Max.
Max. Ref. ±.005 Nom.
ØH Hole Size
ØD
In Sheet
Min. Solder
+.003 –.000
Pad
2
4 — — .020 .019 .095.144 .125
.098
.165
SMTSOSMTSOB 256
2
4
8 (1)12 (1) .060 .060.142—
.219—
.147
.244
SMTSOSMTSOB 440
2
4
.219—
8 (1)12 (1) .060 .060.161—
.166
.244
SMTSOSMTSOB 632
2
4
.281—
8 (1)12 (1) .060 .060.208—
.213
.306
SMTSOSMTSOB 832
2
4
.344—
8 (1)12 (1) .060 .060.245—
.250
.369
SMTSO
SMTSOB116 2 4 8 12 .060 .060.161—
.219—
SMTSO
SMTSOB143 2 4 8 12 .060 .060.208—
.281—
.166
.213
.244
.306
All dimensions are in millimeters.
METRIC
Type
Thread Thru Hole
Thread or
Min.
E
ØH Hole Size
ØD
Length Code “L” ±0.13
Size x
+0.10 Fastener Material Thru Hole
Sheet
A
C
H
In Sheet Min. Solder
(Length code in millimeters)
Pitch –0.08 SteelBrassCode
Thickness
Max.
Max.
Ref.
±0.13
Nom.+0.08 Pad
S1
— SMTSO —
M1 1 2 3 — — — — 0.5 0.48 2.413.66—3.18
2.5
S1.2
— SMTSO —
M1.2 1 2 3 — — — — 0.5 0.48 2.413.66—3.18
2.5
4.19
S1.4
— SMTSO —
M1.4 1 2 3 — — — — 0.5 0.48 2.413.66—3.18
2.5
4.19
—
M1.6 x 0.35
—
SMTSO
M1.6
1
2
3
—
2.5
4.19
M2 x 0.4
—
SMTSO SMTSOB
M2
—
2
3
4 (1)6 (1)8 (1)10 (1) 1.53 1.53 3.6 —5.56—
3.73
6.2
M2.5 x 0.45
—
SMTSO SMTSOB
M25
—
2
3
4 (1)6 (1)8 (1)10 (1) 1.53 1.53 4.09 —5.56—
4.22
6.2
M3 x 0.5
—
SMTSO SMTSOB
M3
—
2
3
4 (1)6 (1)8 (1)10 (1) 1.53 1.53 4.09 —5.56—
4.22
6.2
M3.5 x 0.6
—
SMTSO SMTSOB
M35
—
2
3
4 (1)6 (1)8 (1)10 (1) 1.53 1.53 5.28 —7.14—
5.41
7.77
M4 x 0.7
—
SMTSO SMTSOB
M4
—
2
3
—
3.6SMTSO
SMTSOB3.6—23468101.531.53
5.28—
7.14
— 5.41
7.77
—
4.2SMTSO
SMTSOB4.2—23468101.531.53
6.22—
8.74
— 6.35
9.37
4
—
—
—
0.5
0.48
2.41
3.66
—
3.18
4.19
6 (1)8 (1)10 (1) 1.53 1.53 6.22 —8.74—
6.35
9.37
(1) Type SMTSOB Fasteners with this length code have a shank counterbore.
NUMBER OF PARTS PER REEL / PITCH (MM) FOR EACH SIZE
Length Code
Thread/Thru-Hole
Size
12 34681012
080
—
3500 / 8
—
2000 / 8
—
—
—
—
256, 440, 632, 116, 143
—
1500 / 12
—
1000 / 12
—
650 / 12
—
300 / 16
832
—
1100 / 16
—
800 / 16
—
500 / 16
—
300 / 16
M1, M1.2, M1.4, M1.6
3500 / 8
2500 / 8
2000 / 8
—
—
—
—
—
M2, M25, M3, M35, 3.6
—
1500 / 12 1000 / 12
900 / 12
650 / 12
375 / 16
300 / 16
—
M4, 4.2
—
1100 / 16
800 / 16
675 / 16
500 / 16
375 / 16
300 / 16
—
PART NUMBER DESIGNATION
SMTSO–
440– 8
ET
SMTSOB–440– 8
ET
Type and
Material
Thread or
Thru Hole
Code
Length Finish
Code Code
Packaged on 330 mm recyclable reels. Tape width is 24 mm. Supplied with polyimide patch for vacuum pick up. Reels conform to EIA-481.
K-4 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
NOTE ABOUT PLATED AND UNPLATED MOUNTING HOLES
Broaching and broach/flare types are designed for unplated mounting hole applications. If used in plated mounting holes, the stresses involved
can damage the plating, push out the plating entirely, or break any traces inside the board that might be connected to the plated hole. When
installing into non-plated mounting holes there may even be issues with delamination, measeling or crazing in some instances. Increasing the mounting hole size +.005” to +.008” /+0.13 mm to +0.2 mm may relieve these conditions. If increasing the mounting hole does
not correct the issue then we recommend our surface-mount type fasteners.
It is always recommended that you try the fasteners in your specific application before full production begins. We are happy to provide samples
for this purpose.
General recommendations for “Keep Out” areas are the same as our “Min. Distance Hole C/L to Edge” dimensions stated in the dimensional
charts of our bulletin.
TYPES KF2 AND KFS2 BROACHING NUTS
PART NUMBER DESIGNATION
KFS2– 832
KF2–832–ET
Two Groove
(Registered
Trademark)
Finish
Code
Thread
Code
Type and
Material
C
A
E
T
All dimensions are in inches.
UNIFIED
Type
Thread
Code
A
(Shank)
Max.
Min.
Sheet
Thickness
Hole Size
In Sheet
+.003 –.000
C
±.003
E
±.005
T
±.005
Min. Dist.
HoleC/L
To Edge
KFS2
256
.060
.060
.147
.165
.219
.065
0.16
KF2
KFS2
440
.060
.060
.166
.184
.219
.065
0.17
.138-32
(#6-32)
KF2
KFS2
632
.060
.060
.213
.231
.281
.065
0.22
.164-32
(#8-32)
KF2
KFS2
832
.060
.060
.250
.268
.344
.096
0.25
.190-32
(#10-32)
KF2
KFS2
032
.060
.060
.272
.290
.375
.127
0.28
Thread
Code
A
(Shank)
Max.
Min.
Sheet
Thickness
Hole Size
In Sheet
+0.08
C
±0.08
E
±0.13
T
±0.13
Min. Dist.
HoleC/L
To Edge
Thread
Size
Carbon
Steel
Stainless
Steel
.086-56
(#2-56)
KF2
.112-40
(#4-40)
METRIC
All dimensions are in millimeters.
Type
Thread
Size x
Pitch
Carbon
Steel
Stainless
Steel
M2 x 0.4
KF2
KFS2
M2
1.53
1.53
3.73
4.19
5.56
1.5
4.2
M2.5 x 0.45
KF2
KFS2
M2.5
1.53
1.53
4.22
4.68
5.56
1.5
4.4
M3 x 0.5
KF2
KFS2
M3
1.53
1.53
4.22
4.68
5.56
1.5
4.4
M4 x 0.7
KF2
KFS2
M4
1.53
1.53
6.4
6.81
8.74
2
6.4
M5 x 0.8
KF2
KFS2
M5
1.53
1.53
6.9
7.37
9.53
3
7.1
PennEngineering • www.pemnet.com
K-5
FASTENERS FOR USE WITH PC BOARDS
TYPES KFE AND KFSE BROACHING STANDOFFS
PART NUMBER DESIGNATION
KFSE– 632–12
KFE–632–12ET
UNIFIED
All dimensions are in inches.
Thread
Size
Thru
Hole
+.004
–.003
Thread
or Thru
Carbon Stainless Hole
Code
Steel
Steel
.112-40
(#4-40)
—
KFE
KFSE
.138-32
(#6-32)
—
KFE
—
.116
—
.143
Length
Code
Thread
or Thru
Hole Code
Type and
Material
C
C
Finish
Code
A
E
Length “L” ±.005
(Length Code is in 32nds of an inch)
Type
Two Groove (Registered Trademark)
F
Min.
E
Dist.
±.005 HoleC/L
To Edge
.125
.250
.375
.500
.625
440
4
8
12
16
20
24
—
—
.060
.060
.166
.184
.219
.17
KFSE
632
4
8
12
16
20
24
28
32
.060
.060
.213
.231
.281
.22
KFE
KFSE
116
4
8
12
16
20
24
—
—
.060
.060
.166
.184
.219
.17
KFE
KFSE
143
4
8
12
16
20
24
28
32
.060
.060
.213
.231
.281
.22
Full
.375 ± .016
(1)
1.00
L
(1)
.750
“F” Minimum Thread Length (Where Applicable)
(1)
.875
A
L
A
Min. Hole Size
(Shank) Sheet In Sheet
C
Max. Thick- +.003 –.000 ±.003
ness
.375 Blind
All dimensions are in millimeters.
METRIC
Thread
Size x
Pitch
Thru
Hole
+0.10
–0.08
Type
Thread
or Thru
Carbon Stainless Hole
Code
Steel
Steel
A
Min.
(Shank) Sheet
Max. Thickness
Length “L” ±0.13
(Length Code is in millimeters)
Min.
E
Dist.
±0.13 HoleC/L
To Edge
M3 x 0.5
—
KFE
KFSE
M3
3
4
6
8
10
12
14
16
1.53
1.53
4.22
4.68
5.56
4.4
—
3.6
KFE
KFSE
3.6
3
4
6
8
10
12
14
16
1.53
1.53
5.41
5.87
7.14
5.5
—
4.2
KFE
KFSE
4.2
3
4
6
8
10
12
14
16
1.53
1.53
6.4
6.86
8.74
7.1
“F” Minimum Thread Length (Where Applicable)
Full
9.5 ± 0.4
Two Groove
(Registered
Trademark)
TYPE KFB3 BROACH/FLARE-MOUNT STANDOFFS
PART NUMBER DESIGNATION
KFB3– 632–12ET
Thread
Code
Type and
Material
Length
Code
Finish
Code
All dimensions are in inches.
UNIFIED
Hole Size
In Sheet
C
+0.08
±0.08
K
F
C B
P
E
A
L
Hole Size
Min.
Length “L” ±.005
in Sheet
Thread
ThreadA
Dist.
(Length Code is in 32nds of an inch)
Size
Type
Code
(Shank)
Sheet+.005BC E KP
Hole C/L
(1)(1) Max.Thickness –.001 ±.003 Max. ±.005 ±.003±.010 To
.062.125.187.250.312.375.500.625.7501.00 Edge
.112-40
KFB3440 2 4 6 8 10121620—— .09.050-.065 .166 .122.165.219.179.040 .17
(#4-40)
.138-32
KFB3632 2 4 6 8 101216202432 .09.050-.065 .213 .171.212.280.226.040 .22
(#6-32)
“F” Min. Thread Length
Full
.375 Blind
(Where Applicable)
METRIC
All dimensions are in millimeters.
Hole Size
Min.
Thread
Thread
Ain Sheet
Dist.
Length “L” ±0.13
+0.13BC E KP
Size x
Type
Code
(Shank)
Sheet
Hole C/L
(Length Code is in millimeters)
Pitch
Max.Thickness –0.03 ±0.08 Max. ±0.13 ±0.08±0.25 To
Edge
M3 x 0.5
KFB3
M32346810
121416
2.29
1.27-1.65
4.223.23
4.2
5.56
4.5514.33
M4 x 0.7
KFB3
M42346810
121416
2.29
1.27-1.656.45.23
6.33
8.74
6.6816.36
“F” Min. Thread Length
(Where Applicable)
Full
9.5 ±0.4
(1)Blind at shank end with .375” minimum thread length from head end.
K-6 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
TYPE KSSB BROACHING SNAP-TOP® STANDOFFS
H
PART NUMBER DESIGNATION
KSSB– 156–12
X
Type and
Material
Top Board
Mounting
Hole
Diameter
Code
P
Length Finish
Code Code
L
B
T
C
UNIFIED
All dimensions are in inches.
Length “L” ±.005
Top Board
Mounting
(Length Code is in 32nds of an inch)
Type Hole B C H P T
Diameter
.250.312.375.437 .500.562.625.750 .8751.00±.005±.003±.005±.005±.005
Code
KSSB
156
8101214 16182024 2832 .188 .226 .250 .141 .020
METRIC
All dimensions are in millimeters.
Top Board
Mounting
Length “L” ±0.13
Type Hole
B C H PT
(Length Code is in millimeters)
Diameter ±0.13 ±0.08 ±0.13 ±0.13±0.13
Code
KSSB
4MM 8 10 12141618202225 4.8 5.746.35 3.580.51
TYPE KSSB APPLICATION DATA
Edge
C2
Mounting Hole A
PANEL 2 (TOP)
PANEL 1 (BOTTOM)
Location
Tolerance
Mounting Hole B
Edge
C1
All dimensions are in inches.
UNIFIED
Panel 1
Type
Hardness
Max.
(1)
Bottom
Mounting
Hole B
+.003 -.000
KSSB
HRB 65 / HB 116
.213
Panel 2
Panel
Material
Thickness
Min.
Edge
Distance
C1 Min.
Location
Tolerance
PC Board
.050
.220
±.005
Hardness
Max.
Top
Mounting
Hole A
+.003 -.000
Panel
Material
Thickness
Range
(2)
Edge
Distance
C2 Min.
No Limit
.156
PC Board
or Metal
.040 - .070
.100
Panel
Material
Thickness
Range
(2)
Edge
Distance
C2 Min.
PC Board
or Metal
1 - 1.8
2.54
All dimensions are in millimeters.
METRIC
Panel 1
Type
Hardness
Max.
(1)
Bottom
Mounting
Hole B
+0.08
KSSB
HRB 65 / HB 116
5.41
Panel 2
Panel
Material
Thickness
Min.
Edge
Distance
C1 Min.
Location
Tolerance
Hardness
Max.
Top
Mounting
Hole A
+0.08
PC Board
1.27
5.59
±0.13
No Limit
4
(1) HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell. (2) Available for thicker boards on special order.
PennEngineering • www.pemnet.com
K-7
FASTENERS FOR USE WITH PC BOARDS
ReelFast® SURFACE MOUNT CAPTIVE PANEL SCREWS
NEW
!
Dimples on head
designate metric thread.
Torx /slot driver size.
®
(See chart)
E1
H
PART NUMBER DESIGNATION
SMTPF LS
Type
M– 440– 0
Driver Anti-cross Thread Length
Thread
Code
Code
Feature
ØD
T2
Two Groove
(Registered
Trademark)
Solder
Pad
T1
Plated through
hole not required.
ET
Finish
Code
ØH
G1
C
A
G2
E2
UNIFIED
All dimensions are in inches.
ØK Hole Size ØD Min.
Screw A Min.
in Sheet
Solder Driver
Thread
Thread Length (Shank) Sheet
C
E1E2G1G2HT1T2
Type Code Code Max.ThicknessMax. ±.010 Nom ±.025±.025±.010Nom.Nom.+.003 -.000PadSize
Size
.112-40
SMTPFLSM440 0 .063 .063 .215.280.300.040.210 .100 .38 .55
.220 .340T15
(#4-40)
1
.100
.270
.138-32
0
.040.240
SMTPFLSM632 .063 .063 .247.310.320
.100 .42 .62
.252 .400T15
(#6-32)
1
.100
.300
METRIC
All dimensions are in millimeters.
ØK Hole Size ØD Min.
Screw A Min.
in Sheet
Solder Driver
Thread
Thread Length (Shank) Sheet
C
E1E2G1G2HT1T2
Type Code Code Max.ThicknessMax. ±0.25 Nom ±0.64±0.64±0.25Nom.Nom. +0.08 PadSize
Size
0
15.3
M3 x 0.5 SMTPFLSM
M3
1.61.65.467 7.6
2.59.614 5.6 8.6
T15
1
2.5
6.8
0
16.1 2.5 10.7 15.7
6.4 10.2T15
M3.5 x 0.6 SMTPFLSM M3.5
1.6 1.6 6.277.98.13
1
2.5
7.62
NUMBER OF PARTS PER REEL
ThreadScrew Length Code
Size
-0 -1
440
200 200
632
150 150
M3
200 200
M3.5
150 150
Packaged on 330 mm recyclable reels. Tape width is 24 mm. Supplied with polyimide patch for vacuum pick up. Reels conform to EIA-481.
K-8 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
ReelFast® SURFACE MOUNT CAPTIVE PANEL SCREWS
Patented.
When Assembled
Spring action of
plastic “fingers”
holds screw
in retracted
position.
L
PSHP
T2
PC Board
E C
T1
SMTPR
P
G
A
E1
B C1
T
R
All dimensions are in inches.
UNIFIED
Screw Part Number
Assembly Dimensions
Screw
Retainer
Thread
Thread Length
Part
G
Size
Type Code
Code
Number
± .025
0
.188
.112-40
PSHP 440
SMTPR-6-1
(#4-40)
1
.248
.138-32
PSHP
(#6-32)
632
0
SMTPR-6-1
1
Screw Dimensions
R
etainer Dimensions
TotalA
Min.
Radial C1E1
L
T (Shank)Sheet B
C
E R
Float ±.010 ±.010 ±.015 Nom.
Max. Thick. ±.003 Max. Nom. ±.005
P
± .025
T1
Nom.
T2
Nom.
.000
.026
.478
.646
.510.663
.015 .440.542
.060 .060.167.249.375.325
.570
.723
.478
.646
.510.663
.020 .440.542
.060 .060.167.249.375.325
.570
.723
.188
.000
.248
.026
All dimensions are in millimeters.
METRIC
Screw Part Number
Assembly Dimensions
Thread
Size x
Pitch
Screw
Retainer
Thread Length
Part
G
Type Code
Code
Number
± 0.64
0
4.78
M3 x 0.5 PSHP M3
SMTPR-6-1
1
6.3
M3.5 x 0.6 PSHP M3.5
0
SMTPR-6-1
1
R
etainer Dimensions
T1
Nom.
T2
Nom.
0
.66
12.14
16.41
12.9516.84
.38 11.1813.77
1.53 1.534.246.339.538.26
14.48
18.36
12.14
16.41
12.9516.84
.51 11.1813.77
1.53 1.534.246.339.538.26
14.48
18.36
0
6.3
.66
SCREW - Packaged in bags. Retainers and screws are
sold separately.
Screw Dimensions
P
± 0.64
4.78
RETAINER - Packaged on 330 mm recyclable reels of
465 pieces. Tape width is 24 mm. Supplied with Kapton®
patch for vacuum pick up. Reels conform to EIA-481.
TotalA
Min.
Radial C1E1
L
T (Shank)Sheet B
C
E R
Float ±0.25 ±0.25 ±0.38 Nom.
Max. Thick. ±0.08 Max. Nom. ±0.13
PART NUMBER DESIGNATION
FOR SCREW
PSHP–632– 0
Type
Thread
Code
COLOR CAPABILITIES FOR TYPE PSHP SCREW
L
Length Cap
Code Style
001
Color
Code
(Lobed) (Standard
Black)
The colors shown here (codes #002 thru #007) are non-stocked
standards and available on special order. Since actual cap colors
may vary slightly from those shown here, we recommend that you
request samples for color verification. If you require a custom color or
you need a “color matched” cap, please contact us.
Std. Black #001 Red #002 Orange #003 Yellow #004
Available with Torx®
recess on special order.
PART NUMBER DESIGNATION
FOR RETAINER
SMTPR– 6–1
Type
Retainer
Size
Shank
Code
ET
Finish
Code
.396”/
10.06 mm
Min.
Solder
Pad
Plated through
hole not required.
Four dimples on
head designate
metric thread.
.250” +.003 –.000
6.35 mm +0.08
Stencil Masking Examples
Green #005
Blue #006
Violet #007
Non-flammable UL 94-V0 plastic caps are available on special order.
Metal Phillips Recess
#4-40 & M3 = #1
#6-32 & M3.5 = #2
PennEngineering • www.pemnet.com
K-9
FASTENERS FOR USE WITH PC BOARDS
TYPE PFK BROACHING CAPTIVE PANEL SCREWS
Blue plastic retaining ring*
(Trademark)
E
PART NUMBER DESIGNATION
PFK–632–62
Thread
Code
Type
Diagonal knurl
identifies metric
thread sizes
H
T2
Shoulder
provides
positive
stop during
installation.
T1
Screw
Length
Code
Shown here with
self-clinching mating nut
P
G
A
C
UNIFIED
All dimensions are in inches.
Thread
Size
Type
Thread
Code
.112-40
(#4-40)
PFK
440
.138-32
(#6-32)
PFK
632
Screw
Length
Code
40
62
84
40
62
84
A
(Shank)
Max.
Min.
Sheet
Thickness
Hole
Size In
Sheet
+.003 –.000
C
±.003
E
±.010
.060
.060
.265
.283
.312
.060
.060
.281
.299
.344
Screw
Length
Code
40
62
84
A
(Shank)
Max.
Min.
Sheet
Thickness
Hole Size
In Sheet
+0.08
C
±0.08
E
±0.25
G
±0.4
H
±0.13
1.53
1.53
6.73
7.19
7.92
6.4
9.5
12.7
1.83
G
±.016
.250
.375
.500
.250
.375
.500
H
±.005
.072
.072
T1
Max.
T2
Nom.
Min. Dist.
Hole CL
To Edge
.36
.54
.20
.36
.54
.26
P
±0.64
T1
Max.
T2
Nom.
Min. Dist.
Hole CL
To Edge
0
3.2
6.4
9.14
13.72
5.08
P
±.025
.000
.125
.250
.000
.125
.250
METRIC
All dimensions are in millimeters.
Thread
Size x
Pitch
Type
Thread
Code
M3 x 0.5
PFK
M3
*Retaining rings are plastic with normal 250°F / 120°C temperature limit.
K-10 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
TYPE KFH BROACHING STUDS
Dimple (Registered Trademark)
S
T
PART NUMBER DESIGNATION
KFH–632–8ET
Type and
Material
Thread
Code
Length
Code
Finish
Code
H
A
L
All dimensions are in inches.
UNIFIED
Hole
Max.
Min.
Length “L” ±.010
Thread
Thread
A
Min.
Size in
Hole
Dist.
(Length Code is in 16ths of an inch)
Size
Type
Code
(Shank)
Sheet
Sheet
Size in
H
S
T
HoleC/L
Max.
Thickness
+.003
Attached
±.010
Max.
±.005
To
.250.312.375.500.625.750 –.000Parts (1)Edge
.112-40
(#4-40)
.138-32
(#6-32)
.164-32
(#8-32)
.190-32
(#10-32)
KFH
440 4
5
6
8
10
12 .065.060 .120.145.180.09.020 .15
KFH
632 4
5
6
8
10
12 .065.060 .140.170.200.09.020 .19
KFH
832 4
5
6
8
10
12 .065.060 .166.195.225.09.020 .20
KFH
032 4
5
6
8
10
12 .065.060 .189.220.250.09.020 .20
METRIC
All dimensions are in millimeters.
Hole
Max.
Min.
Length “L” ±0.25
Thread
Thread
A
Min.
Size in
Hole
Dist.
Size x
Type
Code
(Shank)
Sheet
Sheet
Size
in
H
S
T
HoleC/L
(Length Code is in millimeters)
Pitch
Max.
Thickness
+0.08
Attached
±0.25
Max.
±0.13
To
Parts (1)Edge
M3 x 0.5
KFHM3 6
8
10
12
15
18 1.651.53 3 3.74.582.30.51 3.8
M4 x 0.7
KFHM4 6
8
10
12
15
18 1.651.53 4.2 4.85.742.30.51 5.1
M5 x 0.8
KFH
M5
6 8 10121518
1.65
1.5355.8
6.6
2.3
0.51
5.3
(1) Threads are gaugeable to within 2 pitches of the “S” Max. dimension. A class 3B/5H maximum material commercial nut shall pass up to the
“S” Max. dimension.
PennEngineering • www.pemnet.com
K-11
FASTENERS FOR USE WITH PC BOARDS
ReelFast® SURFACE MOUNT RIGHT ANGLE (R’ANGLE®) FASTENERS
Grooves
identify unified
thread
PART NUMBER DESIGNATION
SMTRA 256–8–6
ET
G
Height Length Finish
Code Code Code
Thread
Code
Type
N
P
K
Solder Pad
PL
C
F
J
PA
D
SP
B
L
Stencil Masking Examples
SH
Patented.
T
A
Solder pad can be flush to edge.
Plated through hole not required.
All dimensions are in inches.
UNIFIED
Thread
Size
.086-56
(#2-56)
.112-40
(#4-40)
.138-32
(#6-32)
.164-32
(#8-32)
Min.
Hole
Sheet
Size
ThickIn Sheet
ness +.003 –.000
A
±.006
B
±.006
C
±.006
DHeightG J K N P SP
T
±.006 F ±.006Nom.Nom.Max.Max.±.003Nom.
±.006
.188
.040
.053
.218
.040
.060
.140 .250 .345.020.030.048.040.157.105
6
.188
.040
.053
.250
.050
.065
.160 .281 .390.020.030.048.040.188.125
10
8
.250
.040
.053
.312
.050
.065
.205 .312 .450.020.030.048.040.250.145
12
9
.281
.040
.053
.375
.050
.075
.250 .375 .535.020.030.048.040.312.195
Min.
Sheet
Thickness
Hole
Size
In Sheet
+0.08
A
±0.15
B
±0.15
C
±0.15
DHeightG J K N P SP
T
±0.15
F
±0.15 Nom. Nom. Max. Max. ±0.08 Nom.
±0.15
Type
Thread
Code
Height
Code
Length
Code
Length
L
±.005
SMTRA
256
8
6
SMTRA
440
9
SMTRA
632
SMTRA
832
METRIC
UNIFIED
METRIC
All dimensions are in millimeters.
Thread
Size x
Pitch
Type
M2 x 0.4
SMTRA
Thread Height Length Length
Code Code Code
L
±0.13
M2
6
5
5
1
1.35
5.5
1
1.5
3.568.4
0.5
0.75
1.22
1 4
2.65
M2.5 x 0.45 SMTRA M25
6
5
5
1
1.35
5.5
1
1.5
3.568.4
0.5
0.75
1.22
1 4
2.65
M3 x 0.5
SMTRA
M3
7
5
5
1
1.35
6.35
1.25
1.65
47
9.75
0.5
0.75
1.22
1
4.75
3.2
M4 x 0.7
SMTRA
M4
9
7
7
1
1.35
9.53
1.25
1.65
6.35 9 13.1 0.5 0.751.22 1 7.94.8
Thread
Code
Pad Width Pad Length
PA
PL
Min.
Min.
Hole Spacing Hole Size
SH
In Sheet
±.002
+.003 –.000
375
16
24
300
16
24
SMTRA632-10-8
200
20
32
.053
SMTRA832-12-9
200
20
32
SMTRAM2-6-5
375
16
24
Hole Spacing
SH
±0.05
Hole Size
In Sheet
+0.08
SMTRAM25-6-5
375
16
24
SMTRAM3-7-5
300
16
24
4
1.35
SMTRAM4-9-7
200
20
32
.171
.157
.053
440
.294
.171
.188
.053
632
.356
.233
.250
.053
832
.419
.264
.312
4.57
Parts Pitch Tape Width
Per Reel (mm) (mm)
SMTRA440-9-6
.262
Pad Width Pad Length
PA
PL
Min.
Min.
Part
Number
SMTRA256-8-6
256
Thread
Code
M2
6.62
M25
6.62
4.57
4
1.35
M3
7.47
4.57
4.75
1.35
M4
10.65
6.57
7.9
1.35
K-12 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
TYPE SFK SpotFast® CLINCH/BROACH MOUNT FASTENERS
Dimple (Registered Trademark)
Metal
Plastic
C2
C1
E
Patented.
L
Type
and
Size
Thickness
Code
Panel 1
Thickness
Mounting Hole
±0.08 mm /
+0.08 mm /
±.003”
+.003” –.000”
mmin.mm
in.
0.8.031 3
.118
Panel 2
Thickness
Mounting Hole
Min.
+0.08 mm /
(1)
+.003” –.000”
mmin.
mmin.
1.6.063
2.5.098
C1
Max.
mmin.
2.98.117
C2
±0.08 mm /
±.003”
mmin.
2.9.114
E
Max.
mmin.
3.53.139
Min. Dist
L
Hole C/L
Max.
To Edge
mmin.mm
in.
2.31.0913
0.12
SFK-3
0.8
SFK-3
1.0
1 .039 3
.118
1.6 .063
2.5.098
2.98.117
2.9.114
3.76.148
2.51.099 3
0.12
SFK-3
1.2
1.2.047 3
.118
1.6.063
2.5.098
2.98.117
2.9.114
3.76.148
2.72.1073
0.12
SFK-3
1.6
1.6.063 3
.118
1.6.063
2.5.098
2.98.117
2.9.114
3.76.148
3.12.1233
0.12
SFK-5
0.8
0.8.031 5
.197
1.6.063
4.5.177
4.98.196
4.9.193
5.56.219
2.31.0915.1
0.20
SFK-5
1.0
1 .039 5
.197
1.6 .063
4.5.177
4.98.196
4.9.193
5.56.219
2.51.0995.1
0.20
SFK-5
1.2
1.2.047 5
.197
1.6.063
4.5.177
4.98.196
4.9.193
5.56.219
2.72.1075.1
0.20
SFK-5
1.6
1.6.063 5
.197
1.6.063
4.5.177
4.98
.196
4.9.193
5.56
.219
3.12.1235.1
0.20
(1) Fastener will provide flush application at minimum sheet thickness.
Panel 1
Metal
Panel 2
PCB/plastic
Type SFK joining metal to PCB/plastic.
Can be used as a single flush-mounted
pivot point. For more information, please
contact our Applications Engineering
Department.
PART NUMBER DESIGNATION
SFK– 3–0.8– ZI
Type
Panel 1
Mounting
Hole Code
Thickness
Code
Finish
Code
PennEngineering • www.pemnet.com
K-13
FASTENERS FOR USE WITH PC BOARDS
MATERIAL AND FINISH SPECIFICATIONS
Optional
For Use in Sheet Hardness: (3)
Finish
Threads (1)
Fastener Materials
Standard Finishes
Electro-Plated
Tin ASTM
Internal, External,
Nylon,
B 545, Class B
ASME
ASME
300
Temp.
Passivated
With Clear
B1.1 2B/ B1.1 2A/
Series CDA-510
Limit
and/or
Preservative
ASME
ASME
Carbon Stainless Phosphor CDA-353 200˚ F/
Tested Per
Coating,
No
Black
Type
B1.13M 6H B1.13M 6g Steel
Steel
Bronze
Brass
93˚ C
ASTM A380 annealed (4) Finish
Nitride
HRB 70 /
HB 125
or Less
HRB 65 /
HB 116
or Less
HRB 60 /
HB 107
or Less
HRB 55 /
HB 96
or Less
PC
Board
KF2
••
• ••
KFS2
•• • ••
KFE
••
KFSE
•• • ••
KFB3
••
• ••
• ••
KSSB• • ••
KFH • •
• ••
PFK
Retainer• • • •••
Screw•
• ••
Spring
•
Retaining Ring•
Part Number Codes For Finishes
Threads (1)
None
ET
X
Fastener Materials
BN
Standard Finishes (2)
For Use in Sheet Hardness: (3)
Electro-Plated
Internal,
External, Tin ASTM
Bright
ASME
ASME
300
B 545, Class A
Nickel
Miniature
B1.1 2B/
B1.1 2A/
Hardened
Series
Zinc Plated
With Clear
Over
ISO 1501,
ASME
ASME
Carbon
Carbon
Stainless
Zinc
5µm,
Preservative
Copper
Type
4H6
B1.13M 6H B1.13M 6g
Steel
Steel
Steel
Brass
Diecast
Colorless Coating, annealed (4)
Flash
HRB 80 /
HB 150
or less
PC
Board
• •
S1 to S1.4 0-80 to 8-32
SMTSO
•
M1.6 to M4
•
•
SMTSOB •
•
•
•
SMTRA
•
•••
SMTPFLSM
Retainer•
•
•
Screw •••
Spring
•
PSHP (5)•
SMTPR•
SFK
•
Part Number Codes For Finishes
•
•
•
ZI
ET
•
•
•
CN
(1) For plated studs, Class 2A/6g, the maximum major and pitch diameter, after plating, may equal basic sizes and can be gauged to Class
3A/6h, per ASME B1.1 (see notes at end of table C-1) and ASME B1.13M, Section 8, Paragraph 8.2.
(2) See PEM Technical Support section of our web site for related plating standards and specifications.
(3) HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.
(4) Optimal solderability life noted on packaging.
(5) ABS cap on PSHP screw has a temperature limit of 200˚ F / 93˚ C.
K-14 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
INSTALLATION
For Types KF2 / KFS2 / KFE / KFSE / PFK
PUNCH
1. Prepare properly sized mounting hole in board.
2. Place fastener into the anvil hole and place the mounting
hole over the shank of the fastener as shown in drawing.
3. With installation punch and anvil surfaces parallel, apply
squeezing force until shoulder contacts the board.
ANVIL
Types KF2/KFS2/
KFE/KFSE
Thread Dia. +.080”/2mm
PEMSERTER® Installation Tooling
Type
PUNCH
Max. Screw
Extension
Thread
Code
Anvil Part
Number
Punch Part
Number
KF2/KFS2080 8015899
KF2/KFS2 256/440/M2/M2.5/M3 975200904300
KF2/KFS2
632/M3.5
975200035 975200048
KF2/KFS2
832/M4
975200037
KF2/KFS2
032/M5
975200905300
ANVIL
PEMSERTER® Installation Tooling
Thread
Code
Type
KFE/KFSE 440/116 -4 to -8
KFE/KFSE 440/116 -10 to -12
KFE/KFSE 440/116 -16 to -20
KFE/KFSE 440/116 -20 to -24
KFE/KFSE
M3 -3 to -6
KFE/KFSE
M3 -8 to -10
KFE/KFSE
M3 -12 to -14
KFE/KFSE
M3 -14 to -16
KFE/KFSE 632/143 -4 to -8
KFE/KFSE 632/143 -10 to -12
KFE/KFSE 632/143 -16 to -20
KFE/KFSE 632/143 -22 to -24
KFE/KFSE 632/143 -28 to -32
KFE/KFSE
3.6 -3 to -6
KFE/KFSE
3.6 -8 to -10
KFE/KFSE
3.6 -12 to -16
KFE/KFSE
4.2 -2
KFE/KFSE
4.2 -3 to -6
KFE/KFSE
4.2 -8 to -10
KFE/KFSE
4.2 -12 to -14
KFE/KFSE
4.2 -14 to -16
Type PFK
PEMSERTER® Installation Tooling
Type
Thread
Code
Anvil Part
Number
Punch Part
Number
PFK
440/M3
975200026975200060
PFK
632
975200027975200061
Anvil Part
Punch Part
NumberNumber
975200846300
975200847300
975200848300
975200882300
975200846300
975200847300
975201222300 975200048
975200848300
975200849300
975200850300
975200851300
975200883300
975200884300
975200849300
975200850300
975200851300
975201216300 975200048
975201217300
975201218300
975201220300
975201219300
For Types KSSB / KFH
PUNCH
PUNCH
ANVIL
ANVIL
L + .2”/
5.1 mm Min.
L Min.
D
D
Type KSSB
Type KFH
1. Prepare properly sized mounting hole in board.
2. Place fastener into mounting hole as shown in
drawing.
3. With installation punch and anvil surfaces
parallel, apply squeezing force until head
contacts the board.
Part
D
+.003” –.000”
Number
KFH-440-L
.113”
KFH-632-L
.140”
KFH-832-L
.166”
KFH-032-L
.191”
KSSB-156-L
.216”
Part
Number
KFH-M3-L
KFH-M4-L
KFH-M5-L
KSSB-4mm-L
D
+0.08mm
3.1mm
4.1mm
5.1mm
5.49mm
PennEngineering • www.pemnet.com
K-15
FASTENERS FOR USE WITH PC BOARDS
For Type KFB3(1)
1. Punch or drill properly sized round mounting hole in board.
2. Place fastener into the anvil hole and place the mounting hole over the shank of the
fastener as shown in diagram to the left.
3. Using a punch flaring tool and a recessed anvil, apply squeezing force until the shoulder
of the fastener contacts the board. As the fastener seats itself in the proper position,
the punch tool will flare the extended portion of the shank outward to complete the
installation. The combination of broaching and flaring provides high pushout performance.
BEFORE
AFTER
(1) PennEngineering manufactures and stocks the installation tooling for the KFB3.
PUNCH
Thread
Code
Length
Code
Anvil
Punch
(Flaring Tool)
#4-40
-2
975201213300
M3
-2
975201213300
#4-40
-4 to -8
975200846300
M3
-3 to -6
975200846300
#4-40
-10 to -12
975200847300
#4-40
-16 to -20
975200848300
#4-40
-20 to -24
975200882300
#6-32
-2
975201215300
#6-32
-4 to -8
975200849300
#6-32
-10 to -12
975200850300
#6-32
-16 to -20
975200851300
M4
-8 to -10
975201218300
#6-32
-22 to -24
975200883300
M4
-12 to -14
975201220300
#6-32
-28 to -32
975200884300
M4
-14 to -16
975201219300
Thread
Code
975201231400
975201232400
Length
Code
Anvil
M3
-8 to -10
975200847300
M3
-12 to -14
975201222300
M3
-14 to -16
975200848300
M4
-2
975201216300
M4
-3 to -6
975201217300
Punch
(Flaring Tool)
975201231400
975201221400
ANVIL
Type KFB3
For Type SFK
Step 1. Prepare properly sized mounting hole in both panels.
Step 2. Using only Panel 1, with the punch and anvil surfaces parallel,
Punch
apply squeezing force until the fastener is flush with the top of
Panel 1.
Panel 1
Step 3. Place Panel 2 over fastener and apply squeezing force.
Metal
Anvil
ANVIL DIMENSIONS
Size
SFK-3
SFK-5
Punch
C
±0.13/±.003
(mm) / (in.)
Punch
Part No.
Anvil
Part No.*
3.05 / .120
5.05 / .199
975200048
975200048
970200229300
970200020300
C
Step 2
* Part number for anvil used in Step 2
NOTE:Fastener can be installed in both sheets at once when metal panel is adequately soft
compared to the non-metal panel. E-mail techsupport@pemnet.com for more information.
K-16 PennEngineering • www.pemnet.com
Panel 2
PCB/plastic
Panel 1
Metal
Anvil
Step 3
FASTENERS FOR USE WITH PC BOARDS
INSTALLATION
For SMT Nuts and Standoffs
For SMT R’ANGLE® Fasteners
Polyimide patch applied here
for vacuum pick up.
Solder paste applied
to pad on PCB.
Solder fastener in place
using standard surface
mount techniques.
Flat top for vacuum pick up.
Solder paste applied
to pad on PCB.
Solder fastener in place
using standard surface
mount techniques.
Undercut to accept
solder fillet and
permit flush to
edge installation.
For SMT Captive Panel Screws
Polyimide patch applied
here for vacuum pick up.
Screw snapped in place.
Solder paste applied to
pad on PCB.
Solder fastener in place
using standard surface
mount techniques.
For SMTPFLSM Captive Panel Screws
Polyimide patch applied
here for vacuum pick up.
Solder paste applied to
pad on PCB.
Solder fastener in place
using standard surface
mount techniques.
Installs in retracted/unfastened position
PennEngineering • www.pemnet.com
K-17
FASTENERS FOR USE WITH PC BOARDS
PERFORMANCE DATA(1)
TYPES KF2 / KFS2 / KFE / KFSE / KFB3 / KFH / PFK BROACHING AND BROACH/FLARE MOUNT FASTENERS
UNIFIED
Thread
Type
Code
Max. Nut
Tightening Torque
(in. lbs.)
KF2
KFS2
KFE
KFSE
256(3) .060” FR-4 Panel400
60
6
440
632
832
032
.060” FR-4 Panel400
.060” FR-4 Panel500
.060” FR-4 Panel700
.060” FR-4 Panel700
65
80
95
100
15
30
35
40
KFB3
440
(3)
.060” FR-4 Panel1,000
140
18
632
(3)
.060” FR-4 Panel1,500
170
28
KFH
440
632
832
4
8
15
.060” FR-4 Panel400
.060” FR-4 Panel400
.060” FR-4 Panel400
65
70
80
7
11
16
032
18
.060” FR-4 Panel400
90
17
PFK
440
(3)
.060” FR-4 Panel250
55
(3)
632
(3)
.060” FR-4 Panel400
60
(3)
Type Thread
Code (3)
(3)
(3)
(3)
Max. Nut
Tightening Torque
(N•m)
KF2
M3
KFS2
KFE M4
METRIC
Test Sheet Thickness
Pushout
Installation(lbs.)
Torque-out
&
(lbs.)(2)
(in. lbs.)
Test Sheet Material
(3)
Test Sheet Thickness
Pushout
Installation(N)
Torque-out
&
(kN)(2)
(N•m)
Test Sheet Material
1.5 mm FR-4 Panel2.2
290
1.7
(3)
1.5 mm FR-4 Panel2.2
420
3.4
KFSEM5
(3)
1.5 mm FR-4 Panel2.9
440
4.5
M3
KFB3
M4
(3)
1.5 mm FR-4 Panel4.4
560
2.03
(3)
1.5 mm FR-4 Panel6
680
3.2
M3
0.45
1.5 mm FR-4 Panel1.8
285
0.79
KFH
M4
1.6
1.5 mm FR-4 Panel1.8
355
1.8
M5
2.1
1.5 mm FR-4 Panel1.8
400
1.92
PFK
M3
(3)
1.5 mm FR-4 Panel1.1
245
(3)
METRIC
UNIFIED
TYPE KSSB BROACHING SNAP-TOP® STANDOFFS
Panel 1 (.060” FR-4 Panel) (4)
Panel 2 (Removable) (4)
Type
Installation
(lbs.)
Pushout
(lbs.)
Max. First On
Force (lbs.)
Min. First Off
Force (lbs.)
Min. 15th Off
Force (lbs.)
KSSB
500
110
13
3.0
1.0
Type
Installation
(kN)
Pushout
(N)
Max. First On
Force (N)
Min. First Off
Force (N)
Min. 15th Off
Force (N)
KSSB
2.2
484
57.7
13.3
4.4
Panel 1 (1.5 mm FR-4 Panel) (4)
Panel 2 (Removable) (4)
(1) Published installation forces are for general reference. Actual set-up and confirmation of complete installation should be made by
observing proper seating of fastener as described in the installation steps. Other performance values reported are averages when
all proper installation parameters and procedures are followed. Variations in mounting hole size, sheet material, and installation
procedure may affect performance. Performance testing this product in your application is recommended. We will be happy to
provide technical assistance and/or samples for this purpose.
(2)These are typical values for parts installed in drilled mounting holes. Punched mounting holes yield values approximately 15% less.
(3)Not applicable.
(4) See Application Data drawing on page 7.
PEMSERTER® PRESSES
For best results we recommend using a PEMSERTER® press for installation
of PEM broaching fasteners. For more information on our line of presses
check our web site.
K-18 PennEngineering • www.pemnet.com
FASTENERS FOR USE WITH PC BOARDS
TYPE SFK SpotFast® CLINCH/BROACH MOUNT FASTENERS
Installation into Panel 1 Installation into Panel 2
(3)
Pushout of Panel 2
Type
Thickness Cold-rolled Steel
FR-4 Fiberglass
and Size
Code
kNlbs.
kN lbs.
N lbs.
SFK-3
0.8
6.2
1400
1.8
400
200
45
SFK-3
1.0
SFK-3
1.2
8
SFK-31.6
1800
1.8
400
200
45
8.9
2000
1.8
400
200
45
10.2
2300
1.8
400
200
45
SFK-5
0.8
11.1
2500
1.8
400
400
90
SFK-5
1.0
13.5
3000
1.8
400
400
90
SFK-5
1.2
15.6
3500
1.8
400
400
90
SFK-5
1.6
17.8
4000
1.8
400
400
90
TYPE SMTSO microPEM® FASTENERS(1)(2)
TYPE SMTSO NUTS AND SPACERS/STANDOFFS(1)(2)
Test Sheet Material
Type
and Size
Pushout
(lbs.)
Pushout Torque-outTorque-out
(N)
(in. lbs.)
(N•m)
and Size
SMTSO-44056.5 251
8.56
1
SMTSO-080
SMTSO-632
93.5
416
13.83
1.6
SMTSO-M1
SMTSO-832
151.1
672
26.96
3
SMTSO-M1.2
SMTSO-M3
56.5
251
8.56
1
SMTSO-M1.4
SMTSO-M3.5
93.5
416
13.83
1.6
SMTSO-M1.6
SMTSO-M4
151.1
672
26.96
3
SMTRA256-8-6
51.7
7.1
SMTRA440-9-6
89.5
10.8
SMTRA632-10-8
110.3
SMTRA832-12-9
137.2
METRIC
UNIFIED
TYPE SMTRA R’ANGLE® FASTENERS(1)(2)
Test Sheet Material
.062” Single Layer FR-4
Part
Pushout
Side Load
Number
(lbs.) (lbs.)
Test Sheet Material
Type
.062” Single Layer FR-4
.062” Single Layer FR-4
Pushout
(lbs.)
Pushout Torque-outTorque-out
(N)
(in. lbs.)
(N•m)
85.1
378.7
4.94
0.56
TYPE SMTPR RETAINERS(1)
Test Sheet Material
1.58mm Single Layer FR-4
Part
Pushout
Side Load
Number
(N)
(N)
SMTRAM2-6-5
418.2
56.8
SMTRAM25-6-5
216.5
36.9
8.4
SMTRAM3-7-5
257.6
41.3
21.2
SMTRAM4-9-7
369.3
73.3
Part
Test Sheet Material
.062” Single Layer FR-4
Number
PushoutPushout
(lbs.)(N)
SMTPR-6-1ET161.4 718
Test Sheet Material
Min.Rec.
Type and
Tensile Tightening .060” P.C. Board
Thread Size
Strength
Torque
Pull-off
(5)
(lbs.) (in. lbs.) (4)(lbs.)
SMTPFLSM-440556 4.4
100
SMTPFLSM-632
724
7.0
METRIC
UNIFIED
TYPE SMTPFLSM FASTENERS(1)
105
Test Sheet Material
Min.Rec.
Type and
Tensile Tightening 1.5 mm P.C. Board
Thread Size
Strength
Torque
Pull-off
(5)
(N)(N•m) (4)(N)
SMTPFLSM-M32900 0.61
445
SMTPFLSM-M3.5
3269
0.8
465
TESTING CONDITIONS
Oven
High Temp
Board Finish
Screen Printer
Vias
Quad ZCR convection oven w/ 4 zones Spokes
473˚F / 245˚C
Paste
62% Sn, 38% Pb
Ragin Manual PrinterStencil
None
2 Spoke Pattern
Amtech NC559LF Sn96.5/3.0Ag/0.5Cu (SAC305) (Types SMTSO, SMTRA, SMTPR)
Alpha CVP-390 Sn96.5/3.0Ag/0.5Cu (SAC305) (Type SMTPFLSM)
.0067” / 0.17 mm thick (Types SMTSO, SMTRA, SMTPR)
.005” / 0.13 mm thick (Type SMTPFLSM)
(1) With lead-free paste. Average values of 30 test points. The data presented here is for general comparison purposes only. Actual
performance is dependent upon application variables. We will be happy to provide samples for you to install. If required, we can also test
your installed hardware and provide you with the performance data specific to your application.
(2) Further testing details can be found in our website’s literature section.
(3) In most applications, pullout strength of the SFK fastener in Panel 1 exceeds pushout strength of Panel 2.
(4) Torque values shown will produce a preload of 70% minimum tensile with a nut factor “k” equal to .1.
(5) Failure occurred at the solder joint. Screw retention strength is greater than the retainer.
PennEngineering • www.pemnet.com
K-19
FASTENERS FOR USE WITH PC BOARDS
OTHER FASTENERS FOR CONSIDERATION TO USE WITH PC BOARDS
TYPE PF11MW™ FLOATING CAPTIVE PANEL SCREWS
(See PEM® Bulletin PF)
Unique flare mount feature allow fasteners to “float” in mounting hole.
• Compensates for mating thread misalignment.
• Installs into any panel material.
• Appropriate for close center-line-to-edge applications.
• Color coded knobs available.
Can install
into PC
Board,
plastic
or metal
TYPE PF11MF™ FLARE-MOUNTED CAPTIVE PANEL SCREWS
(See PEM® Bulletin PF)
• Appropriate for close centerline-to-edge applications.
• Doesn’t require high installation force.
• Installs into any panel material.
• Installs flush on back side of panel.
• Color coded knobs available.
Can install
into PC
Board,
plastic
or metal
TYPE SGPC™ SWAGING COLLAR STUDS
(See PEM® Bulletin FH)
•Can be installed into most materials, including stainless steel and rigid non-metallic panels.
•Can be used to attach dissimilar materials.
• Can accommodate multiple panels as long as the total thickness does not exceed the
maximum sheet thickness.
• Appropriate for close center-line-to-edge applications.
TYPE SOAG/SOSG GROUNDING STANDOFFS
(See PEM® Bulletin SO)
• Designed for clinching into steel or aluminum chassis.
• “Gripping teeth” on opposite side of standoff makes firm electrical contact with mating PC Board.
TYPE SKC KEYHOLE® STANDOFFS
(See PEM® Bulletin SK)
• Clinch feature mounts fastener permanently into metal sheet.
• Allows for quick attachment and detachment of PC Board.
• Head is flush or sub-flush in metal sheet.
• Makes horizontal or vertical component mounting possible.
Can install
into PC
Board,
plastic
or metal
PC Board
plastic or
metal
Metal
PC Board
plastic or
metal
Metal
TYPE SSA/SSC/SSS SNAP-TOP® STANDOFFS
(See PEM® Bulletin SSA)
• Spring action holds PC Boards and subassemblies securely, while allowing for quick removal.
• Screws and other threaded hardware are eliminated.
PC Board
plastic or
metal
Metal
For more information on these and other PEM products, visit our PEMNET™ Resource Center at www.pemnet.com
Regulatory compliance information is available in Technical
Support section of our website.
© 2015 PennEngineering.
K-20
Specifications subject to change without notice.
See our website for the most current version of this bulletin.
Technical support e-mail: techsupport@pemnet.com